Maya Ellison
Bioplastics are increasingly being used in formwork for concrete casting, packaging, containers, straws, bags, bottles, and even phone casings and medical implants. Unlike traditional plastics, which are derived from petroleum, bioplastics are obtained from renewable resources, and some are biodegradable. Bioplastics are produced through biotechnology, using microorganisms or genetically modified plants. The first known bioplastic, polyhydroxybutyrate (PHB), was discovered in 1926 by a French researcher, Maurice Lemoigne, and since then, biotechnology has played a strategic role in driving and boosting the transition from fossil-based plastics to bioplastics.
| Characteristics | Values |
|---|---|
| Definition | Bioplastics are polymers obtained from renewable resources, some of which are biodegradable. |
| First discovered | The first known bioplastic, polyhydroxybutyrate (PHB), was discovered in 1926 by French researcher Maurice Lemoigne. |
| Raw materials | Bioplastics are made from 20% or more of renewable materials, including biomass, castor oil, bacterial fermentation of sugars, and fatty acids. |
| Advantages | Reduced use of fossil fuels, smaller carbon footprint, faster decomposition, and potential carbon neutrality. |
| Disadvantages | Biodegradable bioplastics are not necessarily recyclable. |
| Applications | Bioplastics are used in disposable items like packaging, containers, straws, bags, and bottles, and in non-disposable items like carpet, plastic piping, phone casings, 3D printing, car insulation, and medical implants. |
| Industry | Alfa Laval is a company that delivers products for biotech applications related to bioplastics. |
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What You'll Learn
Bioplastics are produced from renewable resources, not petroleum
Bioplastics are a form of biotechnology that uses renewable resources instead of petroleum to produce plastic materials. They are made from natural materials like corn starch, sugarcane, cellulose, wood, sugar, and biomass. The first known bioplastic, polyhydroxybutyrate (PHB), was discovered in 1926 by a French researcher, Maurice Lemoigne, through his work with the bacterium Bacillus megaterium. However, at the time, petroleum was inexpensive and abundant, so the significance of this discovery was not fully recognised.
Bioplastics are designed to address environmental concerns associated with conventional plastics, including pollution and the reliance on fossil fuels. They have several advantages over traditional plastics, including a reduced carbon footprint, faster decomposition, and lower toxicity. Bioplastics also do not contain bisphenol A (BPA), a hormone disruptor commonly found in traditional plastics.
One of the most widely used bioplastics is thermoplastic starch, which constitutes about 50% of the bioplastics market. Starch-based bioplastics are often blended with biodegradable polyesters to produce starch/polylactic acid, starch/polycaprolactone, or starch/Ecoflex blends. These blends are used for industrial applications and are compostable. Other producers have developed starch/polyolefin blends, which have a lower carbon footprint than petroleum-based plastics used for similar applications.
Bioplastics are gaining interest in the context of the bioeconomy and circular economy. Conventional petro-based polymers are increasingly being blended with bioplastics to manufacture "bio-attributed" or "mass-balanced" plastic products. However, the difference between bio- and other plastics might be challenging to define due to these blends.
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Bioplastics are biodegradable and carbon-neutral
Bioplastics are a form of biotech that is gaining popularity in the context of the bioeconomy and circular economy. They are made from renewable resources and are biodegradable, offering a potential solution to plastic pollution. Unlike traditional plastics derived from petroleum, bioplastics can be produced from biomass, which has implications for carbon neutrality.
Bioplastics, such as PHA, are biodegradable and can be produced from biomass, which is a renewable resource. This means that bioplastics can bypass the use of fossil fuels, reducing our reliance on this finite and globally unevenly distributed resource. The production of bioplastics through biotechnology can also help to lower the carbon footprint associated with traditional plastic production.
For example, PHAs are linear polyesters produced intracellularly by organisms as carbon and energy reserves. They have similar physicochemical properties to conventional plastics but are biodegradable and biocompatible, making them an eco-friendly alternative. Other types of bioplastics include PLA, which is produced by bacterial fermentation of sugars, and bio-PA, which consists of around 12% of the global bioplastic market.
The use of bioplastics is becoming more common in disposable items like packaging, containers, straws, bags, and bottles. They are also being used in non-disposable items such as carpet, plastic piping, phone casings, 3D printing, car insulation, and medical implants. The development of bioplastics through biotechnology offers an exciting opportunity to reconnect global growth with sustainability.
However, it is important to note that not all bioplastics are biodegradable, and the terms should not be used interchangeably. Biodegradable refers to the ability to convert plastic back into carbon dioxide, while recyclable refers to the ability to reuse materials without breaking them down.
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Bioplastics can be synthesized from microbial fermentation
Bioplastics are a promising technology that can offer a sustainable and economically feasible approach to obtaining a variety of applicable polymers. They are made from renewable resources and some are biodegradable. The first known bioplastic, polyhydroxybutyrate (PHB), was discovered in 1926 by a French researcher, Maurice Lemoigne, from his work with the bacterium Bacillus megaterium.
The use of bioplastics derived from microbial fermentation offers several advantages. Firstly, it provides a convenient way to utilize food and agricultural waste as sources to biosynthesize polymers. Secondly, the microorganisms used in this process can consume low-cost substrates derived from agricultural and food waste. Finally, the resulting biopolymers have inherently attractive properties such as biodegradability, biocompatibility, and good mechanical and chemical properties.
However, there are also some challenges to using microbial fermentation for bioplastic synthesis. One challenge is finding the optimal microbial strain that can operate in optimal conditions with high productivity and selectivity toward the product. This often requires genetic engineering to improve the yield or direct a microorganism to consume a specific substrate. Additionally, fermentation processes require meticulous control of the environment in terms of temperature, pH, substrate concentration, and oxygen availability.
Overall, the synthesis of bioplastics from microbial fermentation offers a promising and sustainable approach to obtaining applicable polymers with desirable properties. With continued research and investment in this technology, it represents an important step towards a more sustainable future.
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Bioplastics can be made from crop waste
Bioplastics are plastics manufactured from bio-based polymers. They are made wholly or partially from biological materials like plants, renewable biomass sources, or microbes like yeast. They are considered to be eco-friendly as they are biodegradable and do not depend on fossil fuels as a raw material.
Bioplastics like PHA are biodegradable and can bypass the use of fossil fuels since most of them are produced from biomass, which has the potential to be carbon neutral. Polyhydroxybutyrate (PHB), the first known bioplastic, was discovered in 1926 by French researcher Maurice Lemoigne. It is synthesized within specialized microbes. Another example of a bioplastic synthesized within microbes is polyhydroxyalkanoate (PHA), which is also produced by the interaction of titanium (IV) chloride and aluminum alkyl.
Bioplastics can also be made from other biological materials such as corn, sugarcane, tapioca, potatoes, rice, soy, wheat, vegetable oil, woodchips, and sawdust. However, there are some challenges associated with the production of bioplastics from crop waste. The land required for bioplastics competes with food production, and the use of fertilizers and pesticides in growing the crops can result in greater amounts of pollutants. Additionally, the petroleum used to run the farm machinery produces greenhouse gas emissions, and the mechanical properties of bioplastics may not be as good as those of conventional plastics. Nevertheless, with the growing concern over plastic pollution, the emphasis on biodegradable bioplastics made from crop waste is likely to increase in the future.
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Bioplastics are used in disposable items like packaging
Bioplastics are increasingly being used in disposable items like packaging, containers, straws, bags, bottles, and even non-disposable items like carpeting, phone casings, and medical implants. They are an innovative approach to reducing plastic pollution and reliance on fossil fuels, offering an eco-friendly alternative to conventional plastics.
Bioplastics, such as PHA and PLA, are biodegradable and produced from renewable biomass or plant-based sources, which implies potential carbon neutrality. This distinguishes them from traditional plastics, which are derived from petroleum or natural gas. By bypassing the use of fossil fuels, bioplastics can reduce greenhouse gas emissions and contribute to a more sustainable commercial plastic life cycle.
However, it is important to note that the environmental benefits of bioplastics depend on sustainable sourcing and proper disposal. While bioplastics are biodegradable, they still need to be recycled or reused rather than simply discarded, as they will not naturally disappear. Additionally, the production of bioplastics can have trade-offs, including competition with food production and unclear end-of-life management.
Bioplastics are gaining interest in the context of a bioeconomy and circular economy, where virgin polymers are made from renewable or recycled raw materials. They are being utilized in various industries, including food packaging and medical applications. For example, Coca-Cola's PlantBottle is made from 30% sugar cane and other plants, with the remaining 70% being traditional oil-based plastic.
Overall, bioplastics show promise in reducing plastic pollution and offer advantages in terms of biodegradability and reduced carbon footprint. However, a comprehensive solution to the world's plastic problem requires not only the development of better bioplastics but also a significant push towards recycling and reusing plastic materials.
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Frequently asked questions
Bioplastics are biodegradable materials that come from renewable sources. They are used to reduce plastic waste and environmental contamination.
Bioplastics are obtained from renewable resources such as agricultural, cellulose, or potato and corn starch waste. They are also made from biomass, bacterial fermentation of sugars, and genetically modified plants.
Yes, bioplastics are a form of biotechnology. They are produced in microorganisms or genetically modified plants.
